Mary Harris (Harnes) - Tree building-- is she Richardson, widow Harnes?

https://www.ancestry.com/discoveryui-content/view/4179672:60214

Mary Harnes
in the Virginia, U.S., Select Marriages, 1785-1940

Virginia, U.S., Select Marriages, 1785-1940
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Detail Source
Name: Mary Harnes
Gender: Female
Spouse:
Saul Harnes
Child:
Sarah A. Hornbarger

clicking on Sarah leads to
https://www.ancestry.com/discoveryui-content/view/4179670:60214
Sarah A. Hornbarger
in the Virginia, U.S., Select Marriages, 1785-1940
Name: Sarah A. Hornbarger
[Sarah A. Harnes]
Gender: Female
Marital Status: Widowed
Age: 39
Birth Date: 1836
Birth Place: Floyd Co., VA.
Marriage Date: 04 Feb 1875
Marriage Place: Floyd , Virginia
Father:
Saul Harnes
Mother:
Mary Harnes
Spouse:
Dreah T. Holt
FHL Film Number: 31345
Reference ID: P47 E23

Elsewhere Sarah is seen as Sarah Harris.
Including son's death certificate https://www.ancestry.com/sharing/2177670?mark=02ff3793a14c49e795bae...

My interest is HOLT.